問題詳情

四、閱讀測驗（請依照段落上下文意，選出最適當的答案） Mount Mayon, which is the most active volcano in the Philippines, is known for itssteep-sloped cone shape, which is often compared to Mount Fuji in Japan. Like other volcanoesaround the Pacific Ocean, Mayon is a part of the Pacific Ring of Fire. The Smithsonian reports thatthe volcano’s picturesque symmetry makes it something of a tourist attraction, with visitors tryingto get to its rim. However, it is also the perfect cone shape that actually indicates how frequently thevolcano erupts and how dangerous the volcano can be. Its geology and location could soon combinein explosive, and deadly, fashion.Since Mayon’s first recorded eruption in 1616, it has erupted about 58 times, the latest one in this January, ranging from sputters to calamities. Many of Mayon’s eruptions have involvedspraying out lava that collects at the rim. As it sputters over the top, it builds up over time, causingthe steep slopes that have made it famous.For comparison, the Italian volcano Mount Vesuvius of Pompeii has also erupted over 50times in recorded history. In the past, Mount Vesuvius has had a roughly 20-year eruption cycle, thelast serious eruption in 1944. The best known eruption was in AD 79 that led to the burying anddestruction of the city of Pompeii for hundreds of years under many tons of volcanic ash unfoldedin much the same way -- explosions, ash raining down, air so thick that it’s hard to breathe, and thenfinally a pyroclastic flow -- an explosive blast that sends ash, lava, and volcanic gas raining downfast onto the sides of the volcano. It is the most devastating part of an eruption. It’s what buriedPompeii, and Mayon may erupt in a similar fashion.
22. What is the most dangerous part of a volcano eruption?
(A) Gas and ash
(B) Thick air
(C) Pyroclastic flow
(D) Explosion

參考答案

答案：C
難度：非常困難0
統計：A(0),B(0),C(0),D(1),E(0)

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